Machine tool



K. J. EBERHA'RDT 2,317,264

MACHINE TOOL Filed Sept. 29, 1939 April 20, 1943.

6 Sheets-Sheet l :a li. im l| M Il( I I [:i Il lf? It I @1.3, fr |yfl|`.-. I I 111.... Jl I INVENTOR.

/m faire/mear ATTORNEYS April 20, 1943. K. .1. EBERHARD-r l MACHINE TOOL Filed Sept. 29, 1959 6 Sheets-Sheet 2 INVENTOR. Kee/.J fate/mearn ATToRNEY l' HIH Hl HHH HHH Il K. J. EBERHARDT 2,317,264

MACHINE TooL Filed Sept. 29. 1939- 6 Sheets-Sheet 3 -sia l INVENTOR. A Knef. liee/mear April 20, 1943.

K. J. EBERHARDT MACHINE Toor.

Filed sepi. 29,` 1939 6 Sheets-Sheet 4' INVENTOR.

E .N/ e, 3W

April 20, 1943. K. .L EBERHARDT 2,317,264

MACHINE TOOL Filed Sept. 29, 1939 6 Sheets-Sheet 5 INVENTOR. Ma@ J 2e-enne@ ATTOR EY5 K. J. EBERHARDT MACHINE TOOL 6 Sheets-Sheet 6 Filed Sepfl.. 29, 1939 INVENTOR, Knef. J. Beef/mear Patented pr. 20, 1943 IWIAOHINE TOOL Karl J. Eberhardt, Cleveland, Ohio, assignor to The Warner & Swasey Company, Cleveland, Ohio, a corporation oi Ohio Application September 29, 193 9, Serial No. 297,099

22 Claims.

This invention relates to a machine tool and particularly to mechanism for selecting or preselecting the rates of movement of a movable part or parts of the machine and for effecting a change of the rates of movement thereof to the selected or preselected rates.

Inasmuch as the selecting or preselecting mechanism embodying the invention has particular utility when applied to a cross-slide carriage or to a turret slide of a machine tool for controlling the rates of feeding movements of such slides it is so illustrated and described herein, but it should be understood that it could be utilized for controlling the rates of movement of other movable parts of a machine tool, as for example the work spindle.

An object of the invention is to provide a mechanism for selecting or preselecting the diierent rates of movement of a movable part of a machine tool and which mechanism includes movable and indexible members, together with a control lever operatively associated with said members in such manner that the movement of the lever in one direction rst effects a movement of said members from an indexible position into a position to eiiect a rate change to a selected or preselected rate and then effects a movement of said members back to the indexible position..

Another object of the invention is to provide in a machine tool having a part movable at different rates of movement and wherein a control lever is employed to connect and disconnect such part to or from a power source, mechanism for selecting or preselecting the different rates of movement of said part and including movable and indexible members, said mechanism being operatively associated with said lever such that movement of said lever in one direction iirst moves said members from an indexible position into a position that effects a rate change to the selected or preselected rate, then moves said members back to the indexible position and finally effects a connection of said part to said power source, the movement of said control lever in the opposite direction effecting a disconnection of said part from said power source.

.Another object of the invention is to provide in a machine tool having a movable part which is given diierent rates of movement and wherein a control lever is employed to connect and disconnect said part to and from a power source,

vmechanism operatively associated with the drive for said part and with said lever for selecting or preselecting the diiierent rates of movement of said part and which includes members indexible to select or preselect said different rates of movement and movable toward each other to obtain the selected or preselected rate and from each other to a position wherein they may be indexed, the operative association between said mechanism and said lever being such that movement of said lever in one direction rst moves said members toward each other, then effects a movement of said members away from each other,l and then effects a connection of the power source to said part.

Another object of the invention is to provide in a machine tool having a movable part which is given different rates of movement and wherein a control lever is employed to connect and disconnect said part to or from a power source, mechanism that is operatively associated-with the drive for said partand with said lever for selecting or preselecting the different rates of movement of said part and which includes members rotatable to index the same and slidable toward and from each other away from and to an indexible position, the operative association between said mechanism and said lever being such that movement of said lever in one direction iirst slides said members toward each other and away from the indexible position to effect a rate change to the selected or presevlected rate, then eects a sliding movement of said members away from each other and back to the indexible position, and then effects a connection of the power source to said part.

A still further object is to provide mechanism for selecting or preselecting the diierent feeding movements of a slide of a machine tool and which is of such character that it can be mounted on the front face of the apron of the slide in a position wherein it will not interfere with the movement of the slide or with the movement of any other slide or with the operation of the cutting tools carried by said slides. A

A further object of the invention is to provide in a machine tool having a slide which is lgiven different rates of feeding movement by means of drive train and which can be connected or disconnected to or froma power source by means of a control lever, mechanism operatively associated with said control lever for selecting or preselecting the diierent rates of feeding move,- ment of the slide and including movable and indexible members so arranged and so connected with said lever that when the latter is positioned either to connect or disconnectthe power source to or from said slide said members may be indexed.

A still further object is to provide in a machine `'tool having a compound slide, one element of which is given a power feeding movement by means of a feed drive train and another element of which is given an independent power feeding movement by means of a feed drive train, mechanism for selecting or preselecting .either a rate of feeding movement for said first element or a rate of feeding movement for said second element and including members indexible to select or preselect the different rates of feeding movement for said elements and movable from an indexible position to a position that effects a change to the selected or preselected rates,

together with a pair of levers which control the connection and disconnection to a power source of the respective feed drive trains, and means operatively associating said levers and said members such that movement of one or the other of said levers in a single direction first moves said members 'from an indexibleposition into a position that effects the rate change, then back to the indexible position, and then effects a connection of the respective feed drive train tosaid power source.

A still further object is to provide in a machine tool having a plurality of slides, mechanism carried by said slides for selecting or pre'- selecting the different rates of feedingV movements of the slides and including indexible members, together with dials for indexing the same, which dials are located on their respective slides in such position as to be closely adjacent to each other and within easy simultaneous reach of the operator and in a location wherein the operator may observe both dials in an eiiicient and convenient manner.

Further and additional objects and advantages not hereinbefore specified will become apparent hereinafter during a detailed description which is to follow of certain embodiments of the invention illustrated in the accompanying drawings wherein,

Fig. V1 is a front elevational View of a machine tool to which the invention is applied, and in this instance is aturret lathe provided with a cross-slide carriage and cross-slide, as well as with a turret slide.

Fig 2 is a longitudinalvertiealsectional View through theV cross-slide carriage and apron on a larger scale than Fig. 1 andv is taken substantially on line 2-2 of Fig. 5.

Fig. 3 is a detached sectional view through the selecting or preselecting dial mechanism and is taken substantially on line 3-3 of Fig. 2, looking in the direction of the arrows.

Fig; 4 is a detached detail sectional view taken substantially on line 4-4 of Fig. 2, looking in thel direction of the arrows.

Fig. 5 is a transverse sectional viewtaken substantially on irregular line 5-5 of Fig. 2, looking in the directionof the arrows.

Fig. 6 is a horizontal sectional view taken sub.- stantially on line G-S of Fig. 5, looking in the direction of the arrows.

Fig. 7 is a developed view of the indexible members of the selecting and preselecting mechanism shown in the previously referred. to

views. v

Fig. 8 is a fragmentary View similar toFig. 2, but showing the parts in a different position.

Fig. 9 is a view similar to Figs. 2 and 8, but showing the parts. in a still different position.

Fig. 10 is a developed and sectional view through the apron of the cross-slide carriage and is taken substantially on irregular line Ill-I0 of Fig. 5, looking in the direction of the arrows.

Fig. 11 is a longitudinal vertical sectional View through the apron of the turret slide and shows a slightly different form of selecting or preselecting mechanism than that shown in the apron of the cross-slide carriage,

Fig. 12 is a sectional view through the selecting and preselecting dial mechanism shown in. Fig.. 11 and is taken on line I2-I2 thereof looking in the direction of the arrows.

Referring to Fig. V1, the invention is shown by way of illustration as applied to a turret lathe and which lathe comprises a bed I5 provided withflongitudinally extending ways I6 and having at one end a head II in which is mounted the usual work or tool spindle I8 that can be driven at aV plurality of different speeds from a power source by suitable; change speed gearing arranged in the head asl will be well understood.

A turret slide I9 is mounted on the ways I of the-bed for movement longitudinally thereof and is provided on itsk front side with an apron 20.

Intermediate the turretl slide I9A and the head I1 there is slidably` mounted on the ways I6 a cross-slide carriage 2I that has a cross-slide 22 and is provided on its front side with an apron The turret slide I5, cross-slide carriage 2I and cross-slide 22 are moved for purposes of feeding by means of a power driven feed shaft 24 that extends longitudinally of the front of the bed I5 and isoperatively connected atits left hand end, as viewed in the drawings, with'the work spindle I8 as is well understood in the art. The operative connection between the said v shaft 24 and the work spindle I8 is by means of suitable gearing including shiftablegearl elements and a control lever 25 for said elements sucht that a high speed rotation or a low speed rotation'can be imparted to the feed shaft 24 as desired as is well known in the art.

The feed shaft 24 is operatively connected with the turret slidel9, the cross-slide carriage 2I and the cross-slide 22 bymeans of suitable drive trains mounted in the turret slide apron and in the cross-slide carriage apron 23, as will also be understood, and which will later be explained more in detail. Y

Inasmuch as the drive trainv in the turret slidel apron 20- and which operatively connectsv the turret slide with the feed shaft 24 is'a substantialV duplicate of the drive train in the apron 23 of the cross-slidecarriage 2I, when the power drive for the cross-slide is omitted,y it will only be necessary to explain herein in detail the drive train in the cross-slide carriage apron 23v and for this` purpose reference may be had particularly to Figs. 5, and 10,v which latter iigure is a developed view'of said drive train.

The feed shaft has a splined connection with av rotatable gear sleeve mounted against endwise movement in the apron 23, as is well known in the art, and carrying a gear which meshes with a gear 2.1 yformed on a sleeve'that isv fixed to a shaft l28 rotatably mounted; in suitablebearings; in the apron 2,3.

The shaft 28 is provided with a longitudinal"- lyextending slot 29 in which isi s-lidably and rockably mounted a. finger 30 that is provided at one of itsl ends with an. oppositely tapered key .59 and can 'move endwise thereof and this sleeve portion 3|,.v1hile its opposite end is pivotally connected to a collar 32 that'is slidable on the shaft 28. A spring 33 is secured to the underside of .the finger and bears against the bottom of the slot 29 and acts to urge the key portion 3| in a direction radially of the shaft 28.

A gear 34 is formed on a sleeve having a co1- lar 35 and which sleeve is mounted on the shaft 28 for free rotation thereon but is` held against endwise movement by suitable means as Will be well understood. The collar 35 is provided with a key-way 36 into which the key portion 34 of the finger 38 is adapted to project to operatively interconnect the sleeve having the collar 35 and gear 34 with the shaft 28 so that they will rotate with the latter.

.A gear 31 larger than the gear 34 is rotatably mounted on the shaft 28 but held against endwise movement thereon by suitable means and this gear is provided with a key-way 33 also adapted to receive the key portion 3| of the nger 30 so that the gear 31 can be operatively connected to the shaft 28 to rotate therewith as a unit. Y

vIt will be understood that when the collar 32 is shifted axially of the shaft 28 the finger 3U will also be moved longitudinally of the slot 29 to cause the key portion 3| to be selectively engaged with either the key-way 36 of the collar 35 or with the key-way 38 of the gear 31, as the ease maybe, to effect a rotation of either the gear 34 or the gear 31 with the shaft 28.

The gears 34 and 31 are constantly intermeshed, respectively, with gears 39 and 40 formed on a sleeve that is fixed to a shaft 4| rotatably supported in suitable bearings located in the apron 23 of the cross-slide carriage. It will be seen that the shaft 4I through the gear 34 or the gear 31 can be connected with the feed shaft 24 so as to have two different speeds of rotation.

The shaft 4| is provided with a` longitudinally extending slot 42 similar to the slot 29 in the shaft 28 and in this slot 42 there is slidably mounted a finger 43 like the nger 38 and said finger is provided at one of its ends with an oppositely tapered key portion 44, while its opposite end is pivotally connected to a collar that is slidably mounted on the shaft 4|. A spring 46, secured to the finger 43 and located in the slot 42, acts to urge the key portion 44 outwardly fin a radial direction with respect to the shaft 4| and into engagement with a key-way formed in each of four gears 41, 48, 49 and 50 rotatably mounted on the shaft 4| but held against endwise movement by suitable means as will be well understood.

It will also be understood that the finger 43 and the key portion 44 can be shifted by the movement of the collar 45 to selectively engage said key portion in one or another of the keyways in the aforementioned four gears, so that one or the other of the gears 41, 48, 49 and 58 will be operatively connected to the shaft 4| to rotate therewith as a unit.

The gears 41, 48, 49 and 50 are constantly intermeshed respectively with gears 5|, 52, 53 and 54 fixed on a shaft 55 that is rotatably supported in suitable bearings in the apron 23. The shaft 55 has fixed thereon a worm 56 which meshes with a worm wheel 51. The worm wheel 51 is either fixed to or made a part of a sleeve 58 that is freely rotatable on a shaft 59 that is arranged transversely of the shaft 55 and extends from the vrear to the front of the apron 23 (see Fig. 5).

A sleeve 68 is also freely rotatable on the shaft 60 and the sleeve 58 on their adjacent faces are provided with serrations or clutch teeth which act to clutch the sleeve 58 to the sleeve 60 when the two sleeves are brought together. Spring pressed plungers 6| are mounted in the sleeve 58 and engage with the adjacent face of the sleeve 68 and tend to maintain said sleeves in a separated or disengaged position.

The sleeve 60 has formed thereon a gear 62 which is always intermeshed with a large gear' 63 fixed on a shaft 64 mounted in the apron 23 and extending parallel to the shaft 59 and this shaft 64 at its rear endand outwardly of the apron is provided with a pinion B5 in mesh with a rack 66 fixed to the bed I5, Wherefore it will be seen when the shaft 64 and pinion 85 are rotated the cross-slide carriage 2| Will have movement imparted thereto longitudinally of the ways I6 of the bed.

The gear 63 is also in mesh with a pinion 81 fixed on a shaft 68 arranged parallel to the shaft 64 and projecting outwardly of the front of the cross-slide carriage and having fixed thereto a hand wheel 69, as is well known in the art. The sleeve 58 has formed thereon a gear 15 that meshes with a gear 1| formed on a sleeve 12 freely rotatable on a shaft 13 supported in the apron 23. A gear 14 is freely rotatable on the shaft 13 and can have endwise movement thereon. -rThe adjacent faces of the sleeve 12 and gear 14 are provided with serrations forming clutch teeth, whereby the gear 14 can be operatively clutched to the sleeve 12. The sleeve 12 is provided with spring pressed plungers 15 acting to normally maintain the adjacent faces of the sleeve 12 and gear 14 separated and the clutch teeth disengaged.

The gear 14 is meshed with a Wide faced gear 13 formed as part of a sleeve that is splined on the screw shaft 11 which passes through a stationary nut 18 supported in the cross-slide carriage, whence it will be seen that when the gear 16 is rotated the screw 11 will be turned and will have endwise movement imparted thereto by the nut 18, andV since the screw 11 is connected in the conventional Way to the cross-slide 22 the latter will have feeding movement imparted thereto.

The sleeve $8 on the shaft 58 and the gear 14 on the shaft 13 are cammed into clutching engagement with the sleeves 58 and 12 by means of rockable cam members 19 operating against balls 8|). These cam members are rocked by control levers 8| and 82, the former of which controls the engagement and disengagement of the sleeves 58 and 60 to control the longitudinal feeding movement of the cross-slide carriage, while the lever 82 controls the engagement and disengagement of the sleeve 12 and gear 14 to control, in turn, the imparting of feeding movements to the cross-slide.

When the lever 8| is moved from the full line position of Fig. 2 to the dash line position thereof the sleeves 58 and 60 are engaged and longitudinal feeding movement is being imparted to the cross-slide carriage. When the lever 82 is moved from the full line position to the dash line position of Fig. 2 the sleeve 12 and gear 14 are engaged and feeding movement is being imparted to the cross-slide. The levers 8| and 82 are held in their dash line position of Fig. 2, i. e., the engaged or feeding position, by means of spring latches under the control of the rockable handle portions of the levers, as is well understood in the art, and comprising spring pressed pins v83 which engage in recesses or openings 84'.v

It will be understood that feeding movement of the 'cross-slide carriage or of the cross-slide is initiated by manually moving the lever 8| or the lever 82 from full line position to the dash line position of Fig. 2 and that such feeding movement can be terminated by disengaging the pins 83 from the recesses 84, either automatically or manually, to allow the levers 8| and 82 to move from the dash line position to the full line position of Fig. 2, which movement would be occasioned in this instance by gravity.

It has already been explained that in this instance eight different rates of feeding movement can be imparted to either the cross-slide carriage or the cross-slide from the feed shaft 24 through the gearing in the apron, and that these differ# ent rates of feeding movement can be selectively obtained by shifting the collars 32 and 45 to cause certain of the gears to be operatively coupled to the shafts upon which they are mounted.

The collar 32 on the shaft 28 is shifted by means of a two-arm lever pivoted in the apron at 85 with the arm 86 of this lever carrying at its free end a shoe located in the annular groove of the collar 32, while the arm 81 of this lever is provided at its free end with a nger portion 88 which will be referred to hereinafter.

The collar 45 on the shaft 4| is shifted by means of a rockable sleeve 89 supported in the apron and having a lever arm 98 that is provided at its free end with a shoe located in the annular groove formed in the collar 45. The sleeve 89 is provided with a projecting finger portion 9| similar to the finger portion 88- on the arm 8l of the two-arm lever for shifting the collar 32, it being noted that the finger portions 83 and 9| lie closely adjacent to each other for a purpose later to become apparent.

It will be noted that rocking movement imparted to the two-arm lever and the sleeve 89 will result in endwise movement of the collars 32 and 45 on the shafts 28 and 4|, and it will further be noted that the lever arms 81 and 88 are of substantially equal length wherefore any movement imparted to the finger portion 88 will Y result in substantially the same amplitude of movement being imparted to the collar 32, withl the result that the key portion 3| of the finger 3|) can be moved sufficiently far to connect or key either the gear 3'4 or the gear 31 to the shaft 28.

On the other hand it will be noted that the lever arm 90 on the sleeve 89 is substantially four times the length of the finger portion 9|, wherefore movement imparted to the' finger portion 9| of the same amplitude as the movement imparted to. the finger portion 88 will result in moving the collar 4E four times as far as the collar 32 in order that the key portion 44 of the finger 43 can act to key one or the other of the four gears 67|, 48, 4.9 and 50 to theA shaft 4|.

The nger portions 88 and 9| are moved by the mechanismnow to be described and which mechanism serves to select or preselect the different rates of feeding movement to be imparted to the cross-slide carriage or to the cross-slide'. it will also be pointed out that said mechanism is operatively connected with the control levers 8| and 82 in suchl manner that the movement of said control levers not only initiates and terminates the feeding movement of the cross-slide carriage and the cross-slide. but also actuates the selecting or preselecting. mechanism to obtain the different rates of feeding movement.

A shaft 92 is rotatably mounted in. suitable bearings formed in bracket members 93 projecting outwardly from the front face of the apron 23` (see Fig. 6). A pair of spools 94 are splined on the shaft 92 to rotate therewith and move endwise thereof. The spools 94 on their adjacent faces are provided with cooperating series of long and short and short and long projections, as clearly indicated in Fig. '7, which is a developed view of the spools.

The finger -portions 9| and 88, previously re. ferred to, are situated intermediate the adjacent faces of the spools 94 and the series of projections thereon, and when said spools are moved lengthwise of the shaft 92 toward each other with an equalized movement the projectionsron the spools will engage the finger portions 88 and 9| and shift one or the other or vboth to cause certain of the gears on the shafts 28 and 4| to be keyed to said shafts to effect various rate changes in the drive to the cross-slide carriage and the cross-slide. Y

It will be seen that the spools 94 if rotated or indexed to eight different positions will bring different pairs of cooperating projections into alignment with the finger portions 88 and 9|, Wherefore said finger portionscan be moved to eight different relative positions to effect the eight different rate changes in the change speed gearing carried in the apron.

The rotation of the shaft 92 and the indexing of the spools 94 can be accomplished when the spools have been moved endwise away from each other to a position wherein theA projections are out of engagement with the finger portions 88 and 9|, as shown in Figs. `2 and 6, and preferably the indexing will take place when the spools have been moved to their most outward or separated position. The means for moving the spools endwise toward and away from each other with an equalized movement will be explained later following the description which is now to`be given of the means for rotating the shaft 92 and indexing the spools.

The shaft 92 Vhas secured on one of its ends a spiral gear 95 which meshes with asimilar spiral gear 96 fixed to avertically extending shaft 91 that is rotatably supported by the apron and `the cross-slide carriage and has fixed to its upper end a bevel pinion 98 (see Fig. 3.) The bevel pinion 98 meshes with a bevel pinion 99 fixed tor a relativelyV short horizontally positioned shaft |88 that is rotatably supported in a suitable forwardly extending bracket carried by the cross-'slide care riage. The shaft |88 has fixed to its outer end a knob |8| for turning the shaft, while arranged intermediate the knob lill and the outer end of the supporting bracket` for the shaft |99 are dials |82., |83 formed on a supporting unit fixed to the shaft I 08. This supporting unit on its outer face or end is provided' with a series of circumferentially spaced openings located to break through the periphery of the unit and in which are: mounted independently rotatable members |84, each bearing indicia corresponding to the different operative steps of a complete work cycle of the machine. l

It. will: be. seen that when the` members |84 are rotated in the openings, different portions of the circumferences of the members will `be brought into view, as will also the different indicia representing the different operative steps of the work cycle.

It will be noted that when the knob is rotated not onlywill the shaft 92 be rotated-to index the spools 94, but alsothe dials |02, |03 of the unit fixed on the shaft |00 will be turned and the indicia carried by said dials and representing the different rates of feeding movement of the cross-slide carriage and the cross-slide and corresponding to the diierent indexible positions of the spools will be brought into alignment with a fixed pointer (not shown) mounted on the supporting bracket for the shaft |08.

`The shaft 92 has fixed thereto'a collar |05 provided with. eight circumferentially spaced recesses |06 which can be engaged by a spring pressed ball |01 mounted in one of the bearing brackets AS3, wherefore the shaft 92 and the spools 94 will be held in any one of the eight different indexible positions. The spools 94 are moved endwise on the shaftl 92 toward and from each other with an equalized movement by meansof the mechanism now to be explained. A short lever |08 is pivotally mounted at |09 on the face-of the apron and intermediate the ends of the lever. 'Ihe lower end of the lever |08 is provided with a pivoted shoe located in the annular groove formed in the left hand spool (see Fig. 6). The upper end ofthe lever |08 is forkshaped and straddles one end of a link I|0 which is pivotally connected tosaid upper end of the lever |08.

A longer lever |I| is pivotally mounted on the front face of the apron 23 and at its upper end, as indicated at H2. The lower end of the lever I is likewise provided with a pivoted shoe that engages in the annular groove in the right hand spool 94 (see Fig. 6). The lever intermediate its vends is recessed to receive the end of the link IIB opposite to the end thereof that is pivotally connected to the lever |08, and said end ofthe link |I0 in turn is Apivotally connected to the lever |I'I. Y l

It will be seen that endwise movement of the link ||0 will cause an equalized rocking movement of the levers |08 and I I I, with a resultant equalized endwise movement of the spools 94 either toward or away from each other.

The lever ||I at its upper end and adjacent the pivot I|2 is provided with a short angularly disposed arm I I3, the purpose of which will later be made clear.

The link ||0 is provided on its upper side with an actuating block ||4 that has its upper edge recessed or cut away, as indicated at I I5, to form aninclined shoulder'that cooperates with a pivoted pawl I8 for a purpose later to be explained.

When the levers 8| or 82 are in the full line positions of Fig, 2, i. e., clutch disengaged position, the spools 94 are in their outward or indexible position.

The pivoted pawl IIB is carried in a forked portion of a rockable plate I I1 that is mounted on a boss ||'Ia. formed on the front face of the apron and which plate surrounds the cam member 'I9 that is operatively associated with the lever 8| (see Fig. 5). The plate I|'| is provided on its circumference with a radially extending lug IIB that carries a lock screw I|9 to which is attached one end of a spring |28, the other end of which spring is attached to a xed pin secured in the front face of the apron, wherefore it will be seen that the spring |20 tends to rock the plate Il' in a' counter-clockwise direction and-'to maintain an adjustable abutting screw I2| also carried by the lug I |8 in engagement with an abutting pin |22 carried by the lever 8|.

It will be noted that movement of the lever 8| from the full line position of Fig. 2 toward the dash line position thereof causes, through the pin |22 and abutting screw |2|, a clockwise movement of the plate |I`| against the action of the spring 20. The pawl ||6 carried by the plate I is normally held by gravity in the position indicated in Fig. 2, wherefore such movement of the lever 8| from its full line position toward its dash line position of Fig. 2, with an accompanying clockwise movement of the plate II'I, causes the pawl I|6 to act on the inclined shoulder of the cutaway edge |I5 of the block I I4 to move the link |0 endwise and, in the present instance, toward the left, as viewed in Fig. 2. This movement of the link I|0 effects an equalized rocking movement of the levers |88 and and, in turn, an equalized endwise movement of the spools 94 toward each other, that is from the'position shown in Fig. 2 to the position shownin lFig'. 8. Atthis timer'the spools 94 will have been brought toward each other such that the projections on the adjacent faces thereof will have cooperated withv the pin' portions 88 and 9| to eiect .the selected or preselected movement thereof and, in turn, a change to the selected or preselected gear change.

At this time the lever 8| has not reached the dash line position of Fig. 2, but the upwardly extending arm I |611l of the pawl ||6 has come into contact with the end of an adjustable abutment screw I 23 mounted in suitable brackets formed on the front face of the apron. It will also be observed that the radially projecting lug |24 carried by the plate Ill and provided with an adjustable abutting screw I 25 has moved from the position shown in Fig. 2 to the position shown in Fig. 8, at which time it has contacted with the angular-ly disposed arm I|3 of the lever II|.- -iIt will be seen, therefore, thatfurther upward movement ofthel lever 8| toward thedash line position of Fig. 2 now acts to lrock the pawl H8 about its pivotal connection with the plate and out of engagement with the actuating block II4 and also causes the abutting screw |25 to rock the long lever- I| with theresult that the link ||0 is moved endwise toward the right, as viewed in the drawing, and an cqualizedrocking movement is imparted to thelever |08 with a resultant equalized endwise movement of the spools 94'from the position shown in Fig. 8 to the position shown in Fig. 9. Atthis time'the parts are in the position shown in Fig. 9 as stated,

andthe lever 8| is in the dash line position of Fig. 2, i. e., the clutch engaged position and the power feeding movement is being imparted tol the cross-slide carriage.

It will be seen that inasmuch as the spools are in their separated position they can be indexed by turning of the dial knob |8| if it is desired to preselect the rate of feeding movement for the` The latch means formed by'the pin 83 and recess 84 and which holds the lever 8| in clutch en-' gaged position may be released either automatically;v as is well known in the art, or manually,l

and upon such release the lever 8| Vwill move by power feed drive to the cross-slide carriage will 2 to the` be disconnected, During this movement of the lever 8| the spring |20 will rock the plate in a counter-clockwise direction and the abutting screw will move away from the short arm I I3 Y of the lever ||I, while the pawl ||6 will idle over the actuating block ||4 and come to rest in the position shown in Fig. 2, and consequently no movement will be imparted to the link I |0, levers |08, III and spools 94.

As previously stated, the parts have been restored to the position of Fig. 2, and it will be noted that the upward movement of the lever 8| results in rst moving the spools inwardly from an indexible position toward each other to a position wherein the levers 90 and 86 are actuated to obtain the selected or pre-selected rates of movement-then the spools are moved outwardly back to the indexible position and the clutch is engaged to initiate the feed drive to the crossslide carriage, Ywhile the movement of the lever 8| in the opposite direction simply results in a disengagement of the clutch .and a restoration of the parts to `their original position.

When the lever 8| is moved, as just explained, no movement will be imparted to the lever 82, since the adjustable abutting screw |26 carried by the radially projecting lug |21 of the lplate moves away from the roller |28 carried by the laterally extending heel portion ofthe lever 82, as clearly shown in Fig. 2. When it is desired to initiate feeding movement of the cross-slide the lever 82 is moved from the full line position of Fig. 2 to the dash line position thereof, and such movement similarly to the movement of the lever 8 I, rocks the plate I and causes rst an inward I movement of the spools 94 to bring the projections thereof into shifting engagement with the pin portions 88 and 9|, and then an outward movement of the spools to indexing position and an engagement of the clutch to the drive train for the cross-slide. Similarly, the return movement of the lever 82 from the dash line position of Fig. 2-to the full line position thereof, i. e., clutch disengaged position, does not effect any movement of the spools 94 but-allows the plate |I1 and its associated parts to be restored to the position shown in Fig. 2 by the spring |20.

For the sake of simplicity and brevity the intermediate position of the lever 82, at which time the spools are in engagement with the pin portions 88 and 9|, is illustrated in Fig. 8, while the fully raised or clutch engaged position of said lever, at which time the spools are in indexible position, is illustrated in Fig. 9, but it will be understood that the levers 8| and 82 act independently of each other upon the plate I II and that movement of one of said levers does not effect any movement of the other of said levers.

The front face of the apron and the parts mounted on the front side thereof are enclosed by a suitable cover member |29, as clearly shownV in the drawings, and which cover has cutaway portions through which the levers 8| and 82 extend and have free movement therein as clearly indicated in Fig. 2.

The gearing in the apron 20 of the turret slide I9, as previously mentioned, corresponds to the gearing in the apron ofthe cross-slide carriage omitting the power drive to the cross-slide and therefore such gearing has not been illustrated herein.

The change speed gearing in the apron 20 of the turret slide is operatively connected to the drive for the turret slide by clutch means similar to the clutch means disclosedfor the same purpose with reference to the cross-slide carriage, and the engagement and disengagement .of said clutch means is effected by means of a control lever |30 which, when in the full line position .of Fig. 1l, effects .a disengagement of the clutch and when in the dash line position effects an engagement `of the clutch.

A shaft I3| is rotatably mounted in suitable bearings on the front side of the apron and this shaft has splined thereon to rotate :therewith and move endwise thereof similar spools 94 which, as explained for the cross-slide carriage, are =provided on their adjacent faces with series of -cooperating projections. These projections cooperate with finger Vportions |32 and 33 of the pivoted levers |34 and |35 that effect sliding movement of the two and four position sliding keys corresponding to the keys 30 and `43 described in connection with the gearing in the apron of the cross-slide carriage.

It lwill be seen that when the spools 94 .are moved endwise toward each other on ,the shaft |3| and into engagement with the finger portions |32 and |33, said levers |34 and |35 will be rocked and said sliding fingers shifted to effect gearV changes in the change speed drive carried in the apron. 4 Y

When the spools 94 have been moved outwardly out of 'engagement with Vthe finger portions |32 and |33 and into indexible position, as shown in Fig. 11, the shaft |3| can be rotated to index the'k Vspools by the following mechanism: The shaft |3| to the left of the spools, as viewed in Fig. v11, is provided with a bevel pinion |36 that meshes with a similar bevel pinion |31 fixed to the lower end of a vertically extending shaftl |38, the upper end of which has fixed thereto a bevel pinion |39 :(see Fig. 12). The bevel pinion |39 meshes with a similar bevel pinion |40 fixed on the inner end of a horizontally extending shaft I4| that is rotatably mounted in a suitable supporting bracket |42 carried by the front face of the apron, which bracket also is provided with the bearings for the shaft |38. The shaft I 4| has xed thereto at its outer end an operating dialknob |43 and a unit including cylindrical dials |44 and |45 fand independently indexible members I 46 carried'by Y the frontendvof the unit and corresponding to the members |04 previously explained.

It will be seen that rotation of ,the dial knob las is provided with a reduced portion that ex- Y tends through a bearing formed in the part of the bracket |42 and has fixed at its outerY end a collar |47 which is provided with eight equally spaced recesses corresponding to the recesses |06 in the collar as previously explained and as shown in Figs. 2 and 4. The bearing for thereduced portion of the shaft |3| carries a spring pressed pawl |48 which will engage in Vany Vone of the recesses to hold the shaft and the spools 94 in cli'erent indexed positions. e f

The mechanism for imparting equalized endwise movement to the spools toward and from each other includes pivoted levers |49 'and |50 corresponding, respectively', to the pivoted levers.

|98 and and connected to the spools 84 and to a link |5| in the same way as the levers I 08 and are connected to the spools 94 and linkA from the location of the pivotal connection of the lever 8|. It will also be noted for the same reason that the right hand spool 94, as viewed in Fig. 1l, is provided on its right hand side with an elongated sleeve |52 that has the annular groove formed therein with which the lever |50 is connected.

The rockable plate |1 is omitted in the mechanism carried by the apron of the turret slide and the pawl |53, corresponding to the pawl I5, as well as the projection |54 which carries the abutting screw |55 corresponding to the abutting screw |25, are mounted or formed directly on the lever |30. The pawl |53 is normally held in the position shown in Fig. ll'by means of a spring |58, one end of which is connected to a pin projecting from the pawl and the other end of which is connected to a pin carried by the lever |38. The pawl cooperates with an actuating block |51 similar to the block ||4 and provided with a cut out upper edge |58 corresponding to the edge ||5 of the block H4. `An adjustable abutting screw |59 is carried by the front face of the apron and this screw corresponds in function to the screw |23 in that upward movement of the lever |30 brings the angular arm |53a into engagement with the end of said screw to rock the pawl out of engagement with the actuating block |51 so that during further upward movement of the lever |30 motion is not f imparted to the link |5| by the pawl |53. At the time that the pawl |53 is rocked out of engagement with the block |51 .the abutting screw |55 is in contact with the angularly disposed arxn 60 of the lever |50, with the result that the continued upward movement of the lever |30 to dash line position of Fig. 11 eiTects, through the lever |50, link |5| and lever |49 an outward endwise movement of the spools 94 back to indexing position.

It will be understod, of course, that when the lever |30 is in the dash line position of Fig. l1 the clutch controlling the feed drive to the turret slide is engaged. It will also be understood that the rockable handle portion of the lever |30 is provided wth a spring pressed latch pin 83 that engages in the recess 84 to hold the lever |30 in its upward or clutch engaged position in the same way as the levers 8| and 82 are so held.

The latch pin 83 may be automatically or mani ually released to allow the lever |38 to move from dash line or clutch engaged position to the full line or clutch disengaged position of Fig. 11 and such movement of the lever simply results in the pawl idling over the block |51 until it reaches the position Shown in Fig. ll and in the abutting screw |55 moving away fromthe arm |50 of the lever |50, whereby it will be seen that no endwise movement is imparted to the-spools 94 when the lever |30 moves from clutch engaged to clutch disengaged position, but that the parts associated with the lever are restored to their original position.

, The lever |30 and the other parts carried by the front side of the apron 28 are enclosed within a cover member |6| having openings through which the lever |30 and the dial knob |43 and its associated parts can project and vbe operated. It will be noted that the dial knob |43 is Vlocated on the left side of the apron 20 in a position where it can be operated and observed along with the dial knob |0| that is located at the right sideof the cross-slide carriage.

It will be seen from the foregoing description thatvthe movements of the control levers 8|, |32v for the cross-slide that the movements of the control levers 8|, 82 for the cross-slide carriage and the cross-slide, as well as the movement of the control lever |30 for the turret slide result, when moved in one direction, in irst moving the spools from an indexible position to a position to effect the rate changes, and then back to an indexible position and also effect an engagement of the respective clutches, while the movement or said levers in the opposite direction simply effects a disengagement of the respective clutches without causing any change or movement in the spools.

It will also be noted from the foregoing description that the dial knobs |8| and |43 can be rotated to index the spools to either select or preselect the different rates of feeding movement for the cross-slide carriage, cross-slide and turret slide, since the spools are in the indexible l position both when the control levers are in clutch engaged position or in clutch disengaged position.

It will also be understood that when the rates of feeding movement are preselected the spools are indexed during the clutch engaged position of the lever or levers while the cross-slide carriage, cross-slide or turret slide is feeding during one operative step of the work cycle and the preselected rates of movement are obtained when the current feeding movement has trminated and the lever or levers have been moved to clutch disngaged position and then back to clutch engaged position to initiate the feeding movement for the next operative step in the work cycle.

It will also be understood that when the rates of feeding movement are selected the spools are not indexed until the control levers have moved to clutch disengaged position and the preceding operative step of the cycle has been terminated. Although preferred forms of the invention have been illustrated and described herein it will be understood that the invention is susceptible of various modiiications and adaptations within the scope of the appended claims.

Having thus described my invention what I claim is:

l. In a machine tool having a movable part, a power source, mechanism for connecting said part and said power source and including a clutch, a control lever therefor and change speed means, means operatively associated with said mechanism and including a member indexible to select or preselect the different rates of movement of said part and movable to actuate said change speed means to obtain the selected or preselected rate, and means operatively connecting said member with said control lever such that movement of said control lever from clutch disengaged position toward clutch engaged position rst effects a movement of said member from an indexible position into a position to effect a rate change to the selected or preselected rate,

then effects a movement of said member back to the indexible position while effecting an en- ,ga-gement of said clutch.

2. In a machine tool having a movable part. a power source, mechanism for connecting said part to said power source and including a clutch, a control lever therefor and change speed means, means operatively associated with said mechanism and including a member indexble when in apredetermined position to select or preselect the different rates of movement of said part and movable from said position to actuate said change speed means to obtain the selected determined position to select or preselect the different rates of movement of said part and movable from indexing position to an actuating position to obtain the selected or preselected rate of movement, and means for moving said member and including an operating member having means associated therewith and effective during movement of said operating member in one direction to effect a movement of said first named member from indexing position to actuating position, and a second means operatively associated with said operating member and eiective upon a continuation of the movement thereof in said one direction to move said first named member from actuating position back to indexing position, a lever, and means operatively connecting said lever and said operating member such that movement of the lever in' one direction effects said hereinbefore mentioned movement of said operating member,

and means for automatically moving said operating member in the opposite direction independently of said lever to restore the said operating member and the means associated therewith to their original positions.

11. In a machine tool having a movable part, change speed means for moving said part at different rates of movement, and mechanism operatively associated with said change speed means and including a member indexible when in a predetermined position to select or preselect the different rates of movement of said part and movable from indexing position to an actuating position to obtain the selected or preselected rate of movement, and means for moving said member and including a lever provided with means effective during movement of said lever in one direction to effect a movement of said member from indexing position to actuating position, said lever also being provided with a second means eifective upon a continuation of the movement of the lever in said one direction to move said member from actuating position back to indexing position.

12. In a machine tool having a movable part, a power source, mechanism for connecting said part and said power source and including a clutch, a control lever therefor and change speed means, means operatively associated with said mechanism and including members indexible when in a predetermined position to select or preselect the different rates of movement of said part and movable from said position to actuating position to obtain the selected or preselected rate, and means operatively connecting said members with said control lever such that movement of said control lever from clutch disengaged position toward clutch engaged position first effects a correlated movement of said members from indexible position into actuating position and then back to the indexible position while effecting an engagement of said clutch.

13. In a machine tool having a slide provided with an apron, change speed means for moving said slide at different rates of movement and mounted in said apron, means for shifting the shiftable elements of said change speed means and extending beyond the front wall of the apron, mechanism operatively associated with said last named means and supported on the front face of the front wall of the apron and including a member indexible to select or preselect the different rates of movement of said slide and movable to actuate said last named means to shift the shiftable elements of the change speed means to obtain the selected or preselected rate, a control lever, and means operatively connecting said lever with said member in such manner that movement of the lever effects a movement of said member from the indexible position into a position to effect the rate change and back to the indexible position.

14. In a machine tool having a bed, a pairiof slides movable on said bed and each providedA with an apron, change speed means supportedv in each apron for moving the respective slides at different rates of movement, mechanismsoperatively associated with said change speed means and each including members indexible to select or preselect the different rates of movement of the respective slides and movable'to actuatel said change speed means to obtain the selected or preselected rate of movement," and means for indexing said members and including a pair of indexing and indicating dials, said dials being accessible from the front of' the aprons and located near adjacent ends of the respective slides whereby both dials are within easy reach of the operator.

15. In a machine tool having a movable part, a power source, means for connecting said part and said power source and including a clutch and change speed means, a control lever for said clutch, mechanism operatively associated with said change speed means and including members indexible when in a' predetermined position -to select or preselect the different rates of movement of said part, means for moving said members from indexing position to an actuating position to obtain the selected or preselected rate and including a pair of actuating levers interconnected by a link, an operating member provided with an element cooperating with said link when said operating member moves in one direction to move said link and levers to effect a movement of said members to actuating position, said operating member also being provided with a second element effective upon a continuation of the movement in said one direction and cooperating with one of said levers to move said link and levers and said members from actuating position back to indexing position, and means operatively associating said control lever with said operating member such that movement of said control lever in one direction effects the said movement of said operating member in said one direction.

16. In a machine tool a movable part and mechanism for controlling the movement of said part and including members movable toward and away from each other, means for moving said members toward and away from each other and including a pair of actuating levers interconnected by a link, and an operating member provided with separate elements one of which during movement of said operating member cooperates with said link to move said members in one direction and the other element of which during movement of said operating member cooperates with one of said levers to move said members in the opposite direction.

17. A structure such as specified in claim 16 characterized by the provision of two independent levers each of which is operatively associated with said operating member to effect movement thereof.

18. A structure as dened in claim 16 characterized in that the element of the operating member which cooperates with the link is movable relative to said operating member and means is provided for moving said element relative to said operating member and out of cooperation with said. liniiV upon; aJ predetermined; movement ofr saidv operating member;

19; A structureas; d'enedi in; claim 18; and wherein the second' element; of the operating member is xed With respect thereto;

20'- A structure as defined in, claim 1'8 characterized in thaty the. movable element ofV the operating.v member isJ inactive during the movement of said member in one. direction.

21.In a` machine tool having a movableV part, change speed meansfor moving said part at diirerent rates, mechanism4 operatively associated with. said change speed means and including members indexible when inra predetermined position toy select or preselectl the different rates of movement ofV said part, means for movingY said membersy fromY indexing' position to an actuating position to obtain the selected or preselected rate and including a pair of; actuating levers interconnected by a link, an operating member: provided with an element cooperating with said link when said operating member moves in one direction.'l to move. said link and levers to eiect a movement of said members to actuating position, said operating memberv4 also; beingv provided with a second. element, eiective uponr a continuation of the. movement in said one direction and cooperating with one of said, levers to` move said' link and' levers and. said. members from actuating position back to indexing position, anda control lever operatively associa-ted with said operating member such that movement of saidI controlilevex: in one direction eiects the said movementl of said operating memberin said onev direction..

22. In a machine tool having amovable part, change speed means `for, moving said part; at diierent rates, mechanism operatively associated with said change speed means: and including members indexible' when in a. predetermined position to select; or. preselect the; different: rates of movement of said part means formoving: said members from indexing. positionA to an; actuating position toy obtain ther selected or preselected rate and including a pair of' actuating levers interconnected bya link, a control lever for said mechanism and having annintegral portion; provided with an element cooperating with said link when said control lever-moves in one direction to move, said link and levers to effect a movement of said members; toI actuating; position,4 said integral portion also being provided with asecond element eiective upona continuation of the movement. of the control lever in said one; direction. and cooperating with. one of said actuating'levers to move said link and levers, andsaid members from actuating` position back to. indexing. position.

J. EBERI-IARD'IJ.` v 

